Slicing machine



E; K. HOOD SLIGING MACHINE Sept, 11 192s. EAWJQE Oariginal Filed July 2, 1919 2 sheets -sheet 1 flarrie fi Hood WITNESS:

Ernefi't l. Hood deceased; Jnvenior fldminifiirai'rz'z of me amaze of Sept 11 1192s.

HAMSRWH E. K. HOOD Y SLICING MACHINE 2 Sheets-Sheet 2 Original Filed July 2, 1919 WITNESS:

ATTORNEYS Patented Sept. ll, T1923.

unite stares" dam -ERNEST K. HOOD, DECEASED, BY HARRIET H. HOOD, ADMINISTRATRIX, OF INDIAN- APOLIS, INDIANA, ASSIGNOR TO AMERICAN SLICING MACHI1\TE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION Ol? NEW YORK.

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Original application filed July 2, 1919, Serial No. 308,218. Patent No. 1,372,023, dated March 22, 1921. Divided and. this application filed August 2, 1920. Serial No. 400,774.

To all whom it may concern:

Be it known that I, HARRIET H. H001), a

citizen of the United States, and residing at Indianapolis, in the county of Marion and a State of Indiana, administratrix of ERNEST K. HOOD, deceased, late a citizen of, the United States, am in possession of a certain new and useful Improvement in Slicing Ma chines, of which the following is aspecification.

This invention relates to a slicing machine and particularly to a means for sharpening the rotary knife used in connection with the slicing machine. It is a division of my 115 co-pending application bearing Serial Number 308,218, filed July 2, 1919.

It has been found in practice that bread is best out by means of a knife having an -in-- volute curve for the cutting edge. Many machines of this type have been built but it has been found very diflicult to sharpen such a knife. In my invention I provide means for automatically sharpening the knife.

My invention is illustrated more or less 28 diagrammatically in the accompanying drawings wherein: Figure 1 is a partial plan view of a slic ing machine;

Figure 2 is an end elevation; Figure 3 is a side elevation of the sharpeningi roller on an enlarged scale.

Like parts are designated by like char-- acters throughout the drawings. I

A is a base plate which'carries the supaa porting frame A. B is the bearing mounted in the supporting frame. B is a feed screw carried by the bearing B. B is a power shaft lying within the feed screw B and adapted to rotate the knife C which is co mounted upon it and. has a curved cutting edge, preferably an involute curve. D D indicate parts of the bread carrying and supporting mechanism which form-no part of this present invention and therefore, are not illustrated or explained in detail. E is a sharpening roller composed of emery or similar material. Its length is equal to the longest radius of the involute curve of the knife. The roller E is mounted in the frame E. Its mounting may or may not include ball'bearings. The frame E is carried on a swinging arm- E which is pivoted at E to the bracket E rotated adjacent the knife.

The roller E is so positioned that one end of it will be contacted by that portion of the knife blade which is closest to the hub of the knife. As the knife rotates, its

blade will successively contact the surface of the roller at different points and the point of the knife will contact the other end of the roller. 7

The spring F holds the swinging arm E in the proper position so as to bear against the knife blade and theadjusting screw Gr determines the initial locationof-the arm.

A stud and nut F holds the sharpener out of the path of the knife when it is desired to keep the sharpener out of the operative position. F- is a grooveinto which the nut F may be dropped. F F are notches adj acent the groove F 1 The use and operation of this invention are as follows:

llhis device may be used for cutting a large variety of materials but it is preferably used for cutting bread. In cutting bread, a knife blade is very rapidly dulled and it is therefore necessary to provide quent. As the knife blade rotates, that point of the blade nearest the hub is the first to contact the face of the roller. As the rota tion continues, the point of contact between the roller and the knife blade shifts and during one complete revolution of the blade the roller is contacted throughout itsentire length and the entire blade is sharpened. During this rotation as the blade travels along the surface of the roller, the swinging forced back against the resistance of the spring. When the point of the blade has passed from the roller the spring forces the roller forward again so as to bring it in contact with the other end of the blade as that revolves into position. During the sharpening, the roller rotates in response to the movement of theknife blade. The knife edge has a sliding advance action on the arm which carried the roller mounting is emery roller and thus the blade is very rapidl sharpened.

a hen it is desired to throw the s'harpening mechanism out of operation, the studand nut F are Withdrawn from the groove F and the nut is turned through a quarter of a revolution and allowed to drop into the notches F F thus the sharpening mechanism is held out of operating contact With W the knife blade.

Iclaim: I I

In a slicing machine having a spiral edged knife adapted to rotate across the end there- 1,4c7,7e1 I of, a sharpening device for: the knife comprising a pivoted frame, a cylindrical, elongated grinding roller adapted to lie in the path of the edge of the knife and resilient means for rotating said frame into the path of said knife and holding said roller against said knife. p

Si ned at Cincinnati, county of Hamilton and tate of Ohio, this 27 day of July, 1920.

MRS. HARRIET H. HOOD, Administt'atriw for the estate of Ernest K. H ood, inventor, deceased. I 

